01_Prototype-Deployment-Serverless/2-Containerization

Author: Ameen-Alam

06_daca_deployment_guide/01_Prototype-Deployment-Serverless/2-Containerization/Dependency-Management-Poetry-or-Requirements.md

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+# Dependency Management with UV
+
+## Objective
+This guide provides best practices for managing Python dependencies using UV, a modern and fast Python package manager, ensuring reproducible builds and efficient dependency resolution.
+
+## Prerequisites
+- Python 3.11+ installed
+- UV installed
+- Basic understanding of Python packaging
+
+## Step-by-Step Instructions
+
+### 1. Initialize Project with UV
+
+```bash
+# Initialize a new project
+uv --init --package your-package-name
+
+# This creates:
+# - pyproject.toml
+# - README.md
+# - src/your_package_name/
+# - tests/
+```
+
+### 2. Configure pyproject.toml
+
+```toml
+[project]
+name = "your-package-name"
+version = "0.1.0"
+description = "Your package description"
+authors = [
+    {name = "Your Name", email = "[email protected]"}
+]
+dependencies = [
+    "fastapi>=0.68.0",
+    "uvicorn>=0.15.0",
+    "pydantic>=1.8.0",
+]
+requires-python = ">=3.11"
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.uv]
+# UV specific configurations
+resolver = "uv"
+```
+
+### 3. Add Development Dependencies
+
+```bash
+# Add development dependencies
+uv add --dev pytest black isort mypy
+```
+
+### 4. Create Virtual Environment
+
+```bash
+# Create and activate virtual environment
+uv venv
+source .venv/bin/activate  # On Windows: .venv\Scripts\activate
+```
+
+### 5. Install Dependencies
+
+```bash
+# Install all dependencies
+uv pip install --system
+
+# Install in development mode
+uv pip install -e .
+```
+
+### 6. Update Dependencies
+
+```bash
+# Update all dependencies
+uv pip install --upgrade --system
+
+# Update specific package
+uv pip install --upgrade fastapi
+```
+
+### 7. Generate Requirements Files
+
+```bash
+# Generate requirements.txt
+uv pip freeze > requirements.txt
+
+# Generate dev-requirements.txt
+uv pip freeze --dev > dev-requirements.txt
+```
+
+## Best Practices
+
+### 1. Dependency Management
+- Use exact versions for production dependencies
+- Group dependencies by purpose (core, dev, test)
+- Document dependency purposes
+- Regularly update dependencies
+- Use dependency groups for different environments
+
+### 2. Version Control
+- Include pyproject.toml in version control
+- Exclude virtual environment directory
+- Include requirements.txt for compatibility
+- Document version constraints
+- Use semantic versioning
+
+### 3. Security
+- Regularly audit dependencies
+- Use trusted package sources
+- Monitor for vulnerabilities
+- Keep dependencies updated
+- Document security considerations
+
+### 4. Performance
+- Use UV for faster installations
+- Minimize dependency count
+- Optimize dependency resolution
+- Use appropriate version constraints
+- Leverage caching
+
+## Validation
+
+### 1. Check Dependencies
+```bash
+# List installed packages
+uv pip list
+
+# Check for outdated packages
+uv pip list --outdated
+```
+
+### 2. Test Installation
+```bash
+# Test clean installation
+uv pip install --system --no-cache-dir
+
+# Verify package imports
+python -c "import your_package_name"
+```
+
+### 3. Security Audit
+```bash
+# Install safety
+uv pip install safety
+
+# Run security check
+safety check
+```
+
+## Common Issues and Solutions
+
+### Issue 1: Dependency Conflicts
+- **Solution**: Use UV's conflict resolution
+- **Prevention**: Document version constraints
+
+### Issue 2: Slow Installation
+- **Solution**: Use UV's caching
+- **Prevention**: Minimize dependency count
+
+### Issue 3: Version Incompatibility
+- **Solution**: Use appropriate version constraints
+- **Prevention**: Test with different Python versions
+
+## Integration with Docker
+
+### 1. Dockerfile Integration
+```dockerfile
+# Install UV
+RUN curl -LsSf https://astral.sh/uv/install.sh | sh
+
+# Copy dependency files
+COPY pyproject.toml ./
+
+# Install dependencies
+RUN uv pip install --system
+```
+
+### 2. Multi-stage Build
+```dockerfile
+# Build stage
+FROM python:3.11-slim as builder
+
+# Install UV and dependencies
+RUN curl -LsSf https://astral.sh/uv/install.sh | sh
+COPY pyproject.toml ./
+RUN uv pip install --system
+
+# Production stage
+FROM python:3.11-slim
+COPY --from=builder /usr/local/lib/python3.11/site-packages /usr/local/lib/python3.11/site-packages
+```
+
+## Next Steps
+- Configure Dockerfile (see Dockerfile-Best-Practices.md)
+- Set up CI/CD pipeline (see GitHub-Actions-Build-and-Deploy.md)
+- Implement testing strategy